Brake



April 26, 1932I G. H. KETCHUM BRAKE Filed Nov. 6, 1929 .Il o

r r v Il llnalzul-nl. I

Patented Apr. 26, 1932.- i i 1,855,636

UNITED STATES PATENT oFFicEj y GEORGE H. XETCHUM, or HUNTINGTON PARK, cALIFoRNIA BRAKE Application filed November 6, 1929. Serial No. 405,174.

My invention relates generally to brakes and of the type that is adapted for use in and particularly to brakes that are utilized connect-ion with deep Well drilling rigs. for heavy duty, for instance, in connection Referring by numerals to the accompany- With deep well drilling rigs, wherein the appaing drawings which illustrate the practical ratus including the brake, is subjected to the embodiment of my invention, 10 designates a a5 strains developed by the relatively heavy conventional form of brake drum that is weight of the drill string Within the well hole. carried by a shaft 11, the latter being -jour T he principal objects of myinvention are, naled in suitable bearings 12 and in accord to minimize and eliminate, insofar as posance with lny invention thezbrake lining 13 sible, .the heat developed as a result' of the on friction producing member 14 usually comou application of the brake band to the. drum, to posed of asbestos or asbestos composition havmount the brake` lining or friction producing ing Wires or Wire mesh imbedded therein, is material` upon the surface of the drum inlirmly secured in any suitable manner, `prefstead of on the brake band as is the usual prac.- crably by means of screws or .rivets to the per* tice, which arrangement, to a. large extent, riphery ofthe driun. c.;

insulates the drum from the high tempera- Surrounding the brake drum is a brake tures produced as a result of application of band 14 of resilient metal, one end of which the brake band to the drum and further.l to is suitably anchored, preferably .by means of provide simple and efficient. means for efectbolts 15 to the dei-rick floor or other fixed ob- 0 ing a comparatively rapid dissemination of ject andthe opposite end of this brake band 7'` the heat produced in the brake band While the is connected to a shortcrank arm 16. Same is in Service Secured in any suitable manner to the outer Further Objects 0f Illy invention are, t0 aCe 0f the. brake band 1 5 a; SeIeS 0f Small generally improve upon and simplify the conmtal hollsmgs 17 and dSPAOSed adlacent t0* struction of the existing forms of brakes and Sa1d h0us1}gs are Plpes 18 1nd,19 .75 particularly the brakes utilized in connection P1 Pe 18 1,5 Connected t0 a Slutable Source 0f l With deep Well drilling rigs, further, to pro- @001mg ,Hlm-1 SURPIY: P 'eferfbly Water an@ vide abrake and brake cooling apparatus that located m Sad plpe'adlant tothe bl'ake 1S is relatively simple in construction, ineXpena "Hive 20.' Relatively Smau brailch PIPS 21 sive of manufacture and capable of being adconnect Plpe. 18 Wlth the respectlye housmgs- 80 vantageously employed in connection With 17 and' relatlvely Smau branch plpes 22 con' heavy duty brakes and further, to provide a neet Said housilgs with pipe 1.9' construction wherein -the brake drum is not One end of lpe 19 1S Closed m any mutable manner and tie opposite-end communicates Sublected to the comparat'wely mpld Wear with a Waste pipe 28. The pipes 18 and 19 are 85 and high temperatures that are incident to ,l

y pproximately equal 1n length and they also the brakes and brake drums now 1n gener al aproxmately equal the length of ths efer use' tive braking surface of the resilient band 14. .Wth the forgomg alud )the Objects 1n As a result of this circulation of fiuid cool- 40 VleW my mVentlOn @Onslsts 1n Cel'taln novel 'i ing medium through the housings 17 the-heat 9 features of C (mstruition and arrangement of, developed in the brake band, when the same is parts that will hereinafter be more fully deapplied to the brake drum5 will be rapidly scribed and claimed and illustrated in the ac disseminated and as result neither the brake COmPaUYDS- I drawings, in Which: i I band nor the brake drum will become heated Fig. l is a side elevational view of a brake to such a degree as to prevent them from embodying the principles of my invention. functioning inthe desired manner.

Fig. 2 is an enlarged detail section taken Inasmuch as the brake lining or friction approximately on the line 2 2 of Fig. 1. producing member 13 is applied to the sur- Fig. 3 is a front elevational View of a brake face ot the drum instead of to the brake band constructed inaccordance with my invention as is the usual practice, the rim or Wallof the drum is prevented from absorbing the relatively high degree of heat that is developed when the brake is applied, for the brake lining acts as an insulator and the greater portion of the heat produced in service is absorbed by the brake band and this heat is rapidly disseminated by the cooling fluid that circulates through the housings 17.

It will be noted that pipe 18 is connected at oneend only to the supply pipe and that pipe 19 is connected at one end only to the Waste pipe so that both pipes, due to their inherent resiliency are free to move the required short distance to follow the brake band when the same is applied to or released from contact with the brake drum.

In brakes, and particularly those used for heavy duty and Where the brake lining is carried by the brake band, the drum, and particularly the rim portion thereof, very frequeiitl becomes Warped and broken as a result o the relatively high temperatures delio veloped while the brake is in service and further, the efliciency of the brake is impaired for the reason that When the brake drum becomes highly heated the metal in the rim portion thereof tends to low so that irregular lgrooves are produced on the surface of the drum.

My improved construction entirely overcomes these undesirable results inasmuch as ythe brake lining, when applied to the surface p of the drum, functions as an insulator therefor and prevents said drum from becomingunduly heated and the circulating cooling medium very rapidly carries 0H the heat that is produced in the brake band When the saine is applied so that said band is always in condition to give maximum braking ei'ect when ap lied to the lining carried by the drum.

ne of the especially desirable advantages of my improved brake is the measure of safety afforded to life and property, resulting from burst-ing of the brake drum due to overheated conditions, for Where my improved brake cooling arrangement is provided it is impossible for the drum to become heated to such a degree as to crack or fracture and burst. This condition 'is brought about by locating the brake lining upon the surface of the drum so that said lining acts as a heat inand described without departing from the spirit of my invention, the scope of which is set forth in the appended claims.

I claim as my invention:

1. In a brake, a drum, a layer of brake lining secured to the periphery of said drum, a brake band surrounding said drum, a series of relatively small housings `secured to the outer face of said brake band, Which-series of housings extend practically throughout the entire length of said brake band, a water suppl pipe surroundin' and spaced apart from said brake band and housings, branch pipes leading from said Water supply pipe respectively to said housings, a second pipe surrounding said brake band and series of housings and branch pipes leading from said housings to said second pipe.

2. In a brake, a drum, a layer of brake lining secured to the periphery of said drum, a brake band surrounding-said druiiia series of relatively small housingsv secured on'the outer -face of said brake band and means for effecting separate lcirculation of cooling iiuid throulgh said housings. Y v

f 3. n a brake, a drum, a layer of brake lin# ing applied to the periphery of said drum, a brake band surrounding said drum, a series of relatively small housings lsecured on the outer face of said brake band, separate means for supplying cooling fluid to each housing l and a separate cooling Huid outlet for each housing.

4. In a brake, a drum, a brake band surrounding said drum, a series `of relatively small housings secured on the` outer face of' said'baiid and cach housing being provided with a separate cooling fluid inlet and a cool' in fluid outlet. n testimony whereof I afiix my signature.4

GEORGE H. KETCHUM.`

sulator and the, arrangement of the cooling chambers on the brake band which `rapidly disseminates the heat developed when the brake band is applied to the drum.

Thus it Will be seen that I have provided a heavy duty brake and brake cooling apparatus that is relatively simple in construction, inexpensive of manufacture and very effective in performing the functions for which it is intended.

It will be understoodl that minor changes in the size, form and construction of the various parts of my improved brake may be made and substituted for those herein shown 

